Safety device for elevators



(No Model.)

E. P. MOENNING & K. A. W. HABSBLER. SAFETY DEVICE PoR BLEVATORS.

Patentedept. 1

" UNITED STATES EMlL F. MOENNING AND KARL A. NV. HAESELER, OF SANFRANCISCO, OALFORNIA.

SAFETY DEVICE FOR ELEvAToRs.

Application iilecl April 22,

To all whom it may concern:

Beit known that we, EMIL F. MoENNiNe and KARL A. YV. HAESELER, citizensof the United States, residingin the city and county of San Francisco,State of California, haveinvented an Improvement in Safety Attach mentsfor Elevator-Cages; and we hereby declare the following to be afull,clear, and exact description of the same.-

Our invention relates to a novel safety attachment for elevator-cages.

by its rope. `mortised or 5o outer ends of the levers D. The

' accompanying drawings,

It consists in the combination, with the cage and the verticalguide-timbers thereof, of supplemental vertical bars fitting in groovesin the outer faces of the guide-timbers,said vertical bars beingconnected at top and bottom with an gularly-disposed levers, by theaction of which they are drawn toward the center or forced outward.

lt further consists in the connection, with these levers, of thesuspending-link, springs acting upon the levers when the link isreleased by breakage, and cushion-springs upon which the elevator-cageis received when the safety attachment is throwninto action, and incertain details of construction which will be more fully explained byreference to the in which-- Figure l is a side elevation with section ofone of the side timbers. Fig. 2 is an end view of the cage-frame. Fig. 3shows the manner of joining the levers.

A A are the vertical side timbers of the elevator-cage, the platform ofwhich is indicated in the present case at B. These side timbers travellin suitable guides, which extend vertically upon each side of the wellwithin which the elevator moves. They may be made of any suitable ordesirable material, as wood or iron. They are formed with grooves orchannels A', made in their outer faces, these grooves or channels beingof suficient width and depth to receive the vertical bars C and allowthem to lie entirely within the grooves, so as not to form anyfrictional contact with the guides in which the elevator travels whenthe latter is properly suspended The upper ends of the bar O areotherwise fitted to receive the of these levers meet together and abutwithin SPECIFICATION forming part of Letters Patent No. 458,765, datedSeptember 1, 1.89]

1891. Serial No. 390,041. (No model) inner ends cisely the same mannerPATENT OFFICE.

a yoke E, which is fixed centrally to the top of the cage or thecross-beam which connects the two sides A. These meeting ends havesemicircular grooves madein them, and within these grooves balls orrollers F are fitted, surrounding a sleeve G, which is of sufficientlysmaller diameter to allow the balls or rollers to lie between theoutside of the sleeve and the interior of the semicircular grooves orchannels. Through the center of this sleeve a pin H passes, its endsextending out through slots I in the yoke and passing into holes inopposite sides of the link J,whicli is fitted to slide inguiding-channels formed upon each side of. the yoke, as shown. The linkJ is considerably longer than the yoke, and when drawn downward untilthe pin is at the bottom ofthe slot in the yoke the lever-arms D willstand at a more obtuse angle than when at the highest point, the barwhich unites the lower ends of the link then being considerably belowthe bar which connects the sides A of the cage.

Between the meeting ends of the lever-arms D and the top of the yokeinside are fitted the springs K. At the top of the link is a stout loopor eye L, into which the suspending-rope is fixed. When the weight ofthe cage is suspended by this rope, it will be seen that the link willbe drawn up until its bottoni bar is in contact with the top bar of thecage. The ends of the levers D will be drawn up toward the top of theyoke, and will thus compress and ilatten the springs K between the topof the yoke and the top of the levers. These ends of the levers, havingbeen drawn up in this manner, will draw the upper ends of the side barsinward, so that they lie within the sides of the vertical timbers A ofthe cage, and whenever for any reason the inner ends of these levers arepressed downward the outer ends will force the side bars C outward, andthey will be correspondingly projected from their channels in theuprights A, so as to bind againstthe guides between which the elevatortravels. The lower ends of the bars O are similarly connected by leversD', the outer ends of which are united to them, inner ends meet and areconnected in preas before described with the pin, the sleeve,

while the i and roller or ball" Sii bearings outside the sleeve. Byreason of this anti-frictional joint weinsure the easy move4 ment 'ofall the parts upon each other and prevent their being in any waybecoming 5 clogged or prevented from having a free movement The outerends of the levers D and D', where they pass through the mortises in thevertical bars C, have longitudinal slots made in them, as shown at a.Pins pass through the sides of the bars C and through these slots, anditwill be manifest that the lever-arms D and D will be allowed to slideslightly through the slots or mortises in the bars. When by reason ofthe connection with the suspending-rope the inner ends of the lever-armsare drawn up to their highest point, their outer ends are drawninwardly, so that they in no way touch or bind upon the guides betweenwhich the elevator travels; but when by any reason, as the breaking ofthe rope, the springs act to force these bars downward the endsvwill befirst forced out through the vertical bars C,.and,`as these outer endslare slightly beveled, the lower angles being acute will engage with thesides` of the guides. the same time the-slots in the levers are so shortthatthe pins passing through them will act upon the side bars C, andthey also will be forced out into frictional contact with the guides.The peculiar-ity of this construction is such that while the pendedy bythe rope and link roperemains intact, as soon as it becomes broken orfrom other reason the link is allowed to be-forced down by the action ofthe springs above the lever-arms the latter project out and force thebarsv C into contact with the guides, and the whole apparatus isthereafter suspended by the frame-work cousisting of the bars C andleversD and D,.while the cage is free to drop within this frame- ""work.As it drops down upon the top of the lower levers D the shock isrelieved by means so long as the ofthe springs M, which are fixedbetween the top of the meeting ends of the lever D and the lower bar orfloor of thecage. ends of the levers D and D are slightly beveled,.asshown, so that when the device is suspended and the centers of theleversdrawn up to meet at the angle which they maintain in their normalcondition the outer ends of these levers will be flush with or slightlywithin the outer tion-bars C, but when they are released from the rope,so that the center of the bars D is forced downward by the action of thesprings M, the ends of these levers will slide out by reason of the slotmoving over the pin which connects them with thebars C, and thesebeveled ends will be forced out slightly beyond the barC and take apositive hold upon the guides, the first action being that of the leversD at the upper end7 and as the cage is then allowed to drop betweenthese bars it acts upon the levers D' at the bottom and forces them outVin a like manner. This insures the engagement of the ends of both setswvard beyond the line whole device is sus.

The outer faces of the vertical fricf of levers with the guides, and inaddition forces the bars C outward, so that they engage the .guides witha strong frictional contact extending the whole length of the bars.

At the top and bottom of the side timbers A of the cage are fixed theanti-friction rollers O, the outer peripheries of which project justenough beyond the outer faces of the timbers A to form a rolling contactwith the `guides when the elevator is suspendedand in its normalcondition; but the action of the levers D and D will force the'bars Cout of these rollers whenever the levers are released.

In order to clear oif any chips or accumuwhen the cage ismovngupwardly'they will scrape off any accumulated dirt or plane offany-small chips or broken wood which may have been formed by reason ofthe outer ends of the levers D-being forced intoy the guides in checkingthe cage at any time.

N are angle-plates fixed to. the inside faces of the bars C just belowthe levers D and above the top bar of the cage. angle-plates giveincreased bearing-surface beneath the outer ends of the levers, and theupper bar of the cageabuts against them, so

These l fhaving a beveled edge presented, so thatZ as to give an evensupport at each` end and'fV keep it from contact with vers.

Having thus described our invention, what we claim as new,vand desire tosecure by Letters Patent, is

l. In an elevator, the side timbers having grooves or channels madelongitudinally in their out-er faces,v supplemental vertical barsfitting said grooves or channels, levers having their outer endsconnected withsaid bars above and below the cage and their inner endsmeeting cent-rally above and below the the ends of the le- 2. In anelevator, the longitudinally-channeled vertical side timbers,thesupplemental said channels and adapted to respectively, of these barsand their meeting ends jointed together, a yoke connected with the topof the cage, having' guide-channels upon each side,a suspending-f IOOIIO

tzrl

link sliding in said guide-channels and having a bar at the bottom whichengages and supports the top bar of the cage, a pin passing through themeeting ends of the levers, and corresponding holes in the sides of thelink, slots in the sides ot' the yoke which allow said pin to travel upand down, so that the levers may be moved from an obtuse angle with eachother when the side bars are forced outwardly to a greater angle whenthe bars are drawn into the channel in the side timbers, and springs xedbetween the top of the yoke and the upper side of the meeting ends otthe bars, whereby the latter are forced downward, so as to extend theirends and the side bars when the device is released from thesuspending-rope, substantially as herein described.

3. In an elevator, the vertically-channeled side timbers, supplementalbars fitted to lie in said channels in the exterior of the timbers,levers above and below the elevatorcage, having their inner endsconnectedtogether, their outer ends extending through mortises in theside bars and beveled so as to engage the guide-timbers when forcedoutward, longitudinal slots made in these levers within the mortises otthe side bars, and pins passing through the side bars and through theseslots, whereby the ends of the levers may be drawn inward when the cageis suspended and allowed to extend slightly beyond the faces of the sidebars when the levers and bars are forced outwardly, substantially asherein described.

4. In an elevator, the cage having the vertical side timbers channeledlongitudinally in their outer faces, a flexible jointed supplementalframe-work consisting of side bars C, fitting in the channels of theside timbers of the elevator-car, levers D and D above and below theelevator-car, having their inner ends connected together with ananti-frictional joint and the outer ends pivoted to the supplementalside bars, yokes connected with the top and bottom of the cage, havingslots through which the pins connecting the meeting ends of the leversextend, a link sliding in guides in the upper yoke, having anatt-achment at the upper end for the suspending-rope, and the pinconnecting the uppe'r levers extending through holes in its sides,springs iitted between the top of the yoke and the top of the upperlevers, whereby the latter are forced downward and outward when releasedfrom the weight of the cage, and springs fixed between the bottom ofthecage and the tops of the meeting ends of the lower levers, so that thecage may drop upon these springs when the side bars and levers have beenforced out into frictional contact with the elevator-guides,substantially as herein described.

5. In an elevator, the combination of the vertically channeled sidetimbers, supplemental bars fitting said channels, centrallyjointedlevers above and below the car, the outer ends of which connect with theupper and lower ends of the supplemental bars, a suspending link,springs acting upon the upper levers, and rollers journaled in the sidetimbers, with their peripheries projecting and traveling in contact withthe guides while the cage is suspended, substantially as hereindescribed.

G. In an elevator, the guides thereof and a cage or car, in combinationwith Scrapers carried by the cage or car, having their edges actingagainst the guides to plane or smooth the same, substantially as hereindescribed.

In witness whereof we have hereunto set our hands.

. EMIL F. MOENNING.

KARL A. IV. HAESELER.

Witnesses:

S. H. Nonnen, H. F. Asonuox.

